High levels of so-called good cholesterol in older people could reduce the chances of developing Alzheimer's disease, according to new research.
The study, published in Archives of Neurology, investigated the association between levels of fat in the blood and Alzheimer's disease.
It was found that high levels of high-density lipoprotein (HDL), or good cholesterol, is related to a lesser chance of developing the condition.
Dr Susanne Sorensen of the Alzheimer's society said that the best way to reduce the risk of dementia is to undergo regular blood pressure and cholesterol tests, keep to a healthy weight and eat a nutritious Mediterranean-style diet.
"More research is now needed to fully understand the link between HDL cholesterol and the processes that lead to Alzheimer's disease. Yet the government invests eight times less in dementia research than cancer research," she added.
This comes after the Forestry Commission Wales said that woodland walks should be prescribed to help the mental and physical health of older people, as exercising outdoors has additional benefits to doing so inside.